Watch the 'Stranger Things' Kids Slay 'Uptown Funk' Before the Emmys

Caleb McLaughlin, Millie Bobby Brown and Gaten Matarazzo - Emmys - H - 2016
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Before the cameras started rolling, Gaten Matarazzo, Millie Bobby Brown and Caleb McLaughlin from the hit Netflix series entertained the crowd with a dance number.

We already told you about the kids from Stranger Things having hidden musical talents — well, they're not so hidden anymore.

At Sunday's Emmy Awards, before the TV cameras started rolling, Gaten Matarazzo, Millie Bobby Brown and Caleb McLaughlin from the hit Netflix series entertained the all-star crowd by taking over for Bruno Mars on Mark Ronson's "Uptown Funk."

Some lucky Emmy crowd members caught all the untelevised action.